1 //===-- SparcAsmPrinter.cpp - Sparc LLVM assembly writer ------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to GAS-format SPARC assembly language.
13 //===----------------------------------------------------------------------===//
16 #include "InstPrinter/SparcInstPrinter.h"
17 #include "MCTargetDesc/SparcMCExpr.h"
18 #include "SparcInstrInfo.h"
19 #include "SparcTargetMachine.h"
20 #include "SparcTargetStreamer.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/CodeGen/AsmPrinter.h"
23 #include "llvm/CodeGen/MachineInstr.h"
24 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
25 #include "llvm/CodeGen/MachineRegisterInfo.h"
26 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
27 #include "llvm/IR/Mangler.h"
28 #include "llvm/MC/MCAsmInfo.h"
29 #include "llvm/MC/MCContext.h"
30 #include "llvm/MC/MCInst.h"
31 #include "llvm/MC/MCStreamer.h"
32 #include "llvm/MC/MCSymbol.h"
33 #include "llvm/Support/TargetRegistry.h"
34 #include "llvm/Support/raw_ostream.h"
37 #define DEBUG_TYPE "asm-printer"
40 class SparcAsmPrinter : public AsmPrinter {
41 SparcTargetStreamer &getTargetStreamer() {
42 return static_cast<SparcTargetStreamer &>(
43 *OutStreamer.getTargetStreamer());
46 explicit SparcAsmPrinter(TargetMachine &TM,
47 std::unique_ptr<MCStreamer> Streamer)
48 : AsmPrinter(TM, std::move(Streamer)) {}
50 const char *getPassName() const override {
51 return "Sparc Assembly Printer";
54 void printOperand(const MachineInstr *MI, int opNum, raw_ostream &OS);
55 void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &OS,
56 const char *Modifier = nullptr);
57 void printCCOperand(const MachineInstr *MI, int opNum, raw_ostream &OS);
59 void EmitFunctionBodyStart() override;
60 void EmitInstruction(const MachineInstr *MI) override;
61 void EmitEndOfAsmFile(Module &M) override;
63 static const char *getRegisterName(unsigned RegNo) {
64 return SparcInstPrinter::getRegisterName(RegNo);
67 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
68 unsigned AsmVariant, const char *ExtraCode,
69 raw_ostream &O) override;
70 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
71 unsigned AsmVariant, const char *ExtraCode,
72 raw_ostream &O) override;
74 void LowerGETPCXAndEmitMCInsts(const MachineInstr *MI,
75 const MCSubtargetInfo &STI);
78 } // end of anonymous namespace
80 static MCOperand createSparcMCOperand(SparcMCExpr::VariantKind Kind,
81 MCSymbol *Sym, MCContext &OutContext) {
82 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Sym,
84 const SparcMCExpr *expr = SparcMCExpr::Create(Kind, MCSym, OutContext);
85 return MCOperand::CreateExpr(expr);
88 static MCOperand createPCXCallOP(MCSymbol *Label,
89 MCContext &OutContext) {
90 return createSparcMCOperand(SparcMCExpr::VK_Sparc_None, Label, OutContext);
93 static MCOperand createPCXRelExprOp(SparcMCExpr::VariantKind Kind,
94 MCSymbol *GOTLabel, MCSymbol *StartLabel,
96 MCContext &OutContext)
98 const MCSymbolRefExpr *GOT = MCSymbolRefExpr::Create(GOTLabel, OutContext);
99 const MCSymbolRefExpr *Start = MCSymbolRefExpr::Create(StartLabel,
101 const MCSymbolRefExpr *Cur = MCSymbolRefExpr::Create(CurLabel,
104 const MCBinaryExpr *Sub = MCBinaryExpr::CreateSub(Cur, Start, OutContext);
105 const MCBinaryExpr *Add = MCBinaryExpr::CreateAdd(GOT, Sub, OutContext);
106 const SparcMCExpr *expr = SparcMCExpr::Create(Kind,
108 return MCOperand::CreateExpr(expr);
111 static void EmitCall(MCStreamer &OutStreamer,
113 const MCSubtargetInfo &STI)
116 CallInst.setOpcode(SP::CALL);
117 CallInst.addOperand(Callee);
118 OutStreamer.EmitInstruction(CallInst, STI);
121 static void EmitSETHI(MCStreamer &OutStreamer,
122 MCOperand &Imm, MCOperand &RD,
123 const MCSubtargetInfo &STI)
126 SETHIInst.setOpcode(SP::SETHIi);
127 SETHIInst.addOperand(RD);
128 SETHIInst.addOperand(Imm);
129 OutStreamer.EmitInstruction(SETHIInst, STI);
132 static void EmitBinary(MCStreamer &OutStreamer, unsigned Opcode,
133 MCOperand &RS1, MCOperand &Src2, MCOperand &RD,
134 const MCSubtargetInfo &STI)
137 Inst.setOpcode(Opcode);
139 Inst.addOperand(RS1);
140 Inst.addOperand(Src2);
141 OutStreamer.EmitInstruction(Inst, STI);
144 static void EmitOR(MCStreamer &OutStreamer,
145 MCOperand &RS1, MCOperand &Imm, MCOperand &RD,
146 const MCSubtargetInfo &STI) {
147 EmitBinary(OutStreamer, SP::ORri, RS1, Imm, RD, STI);
150 static void EmitADD(MCStreamer &OutStreamer,
151 MCOperand &RS1, MCOperand &RS2, MCOperand &RD,
152 const MCSubtargetInfo &STI) {
153 EmitBinary(OutStreamer, SP::ADDrr, RS1, RS2, RD, STI);
156 static void EmitSHL(MCStreamer &OutStreamer,
157 MCOperand &RS1, MCOperand &Imm, MCOperand &RD,
158 const MCSubtargetInfo &STI) {
159 EmitBinary(OutStreamer, SP::SLLri, RS1, Imm, RD, STI);
163 static void EmitHiLo(MCStreamer &OutStreamer, MCSymbol *GOTSym,
164 SparcMCExpr::VariantKind HiKind,
165 SparcMCExpr::VariantKind LoKind,
167 MCContext &OutContext,
168 const MCSubtargetInfo &STI) {
170 MCOperand hi = createSparcMCOperand(HiKind, GOTSym, OutContext);
171 MCOperand lo = createSparcMCOperand(LoKind, GOTSym, OutContext);
172 EmitSETHI(OutStreamer, hi, RD, STI);
173 EmitOR(OutStreamer, RD, lo, RD, STI);
176 void SparcAsmPrinter::LowerGETPCXAndEmitMCInsts(const MachineInstr *MI,
177 const MCSubtargetInfo &STI)
180 OutContext.GetOrCreateSymbol(Twine("_GLOBAL_OFFSET_TABLE_"));
182 const MachineOperand &MO = MI->getOperand(0);
183 assert(MO.getReg() != SP::O7 &&
184 "%o7 is assigned as destination for getpcx!");
186 MCOperand MCRegOP = MCOperand::CreateReg(MO.getReg());
189 if (TM.getRelocationModel() != Reloc::PIC_) {
190 // Just load the address of GOT to MCRegOP.
191 switch(TM.getCodeModel()) {
193 llvm_unreachable("Unsupported absolute code model");
194 case CodeModel::Small:
195 EmitHiLo(OutStreamer, GOTLabel,
196 SparcMCExpr::VK_Sparc_HI, SparcMCExpr::VK_Sparc_LO,
197 MCRegOP, OutContext, STI);
199 case CodeModel::Medium: {
200 EmitHiLo(OutStreamer, GOTLabel,
201 SparcMCExpr::VK_Sparc_H44, SparcMCExpr::VK_Sparc_M44,
202 MCRegOP, OutContext, STI);
203 MCOperand imm = MCOperand::CreateExpr(MCConstantExpr::Create(12,
205 EmitSHL(OutStreamer, MCRegOP, imm, MCRegOP, STI);
206 MCOperand lo = createSparcMCOperand(SparcMCExpr::VK_Sparc_L44,
207 GOTLabel, OutContext);
208 EmitOR(OutStreamer, MCRegOP, lo, MCRegOP, STI);
211 case CodeModel::Large: {
212 EmitHiLo(OutStreamer, GOTLabel,
213 SparcMCExpr::VK_Sparc_HH, SparcMCExpr::VK_Sparc_HM,
214 MCRegOP, OutContext, STI);
215 MCOperand imm = MCOperand::CreateExpr(MCConstantExpr::Create(32,
217 EmitSHL(OutStreamer, MCRegOP, imm, MCRegOP, STI);
218 // Use register %o7 to load the lower 32 bits.
219 MCOperand RegO7 = MCOperand::CreateReg(SP::O7);
220 EmitHiLo(OutStreamer, GOTLabel,
221 SparcMCExpr::VK_Sparc_HI, SparcMCExpr::VK_Sparc_LO,
222 RegO7, OutContext, STI);
223 EmitADD(OutStreamer, MCRegOP, RegO7, MCRegOP, STI);
229 MCSymbol *StartLabel = OutContext.CreateTempSymbol();
230 MCSymbol *EndLabel = OutContext.CreateTempSymbol();
231 MCSymbol *SethiLabel = OutContext.CreateTempSymbol();
233 MCOperand RegO7 = MCOperand::CreateReg(SP::O7);
238 // sethi %hi(_GLOBAL_OFFSET_TABLE_+(<SethiLabel>-<StartLabel>)), <MO>
240 // or <MO>, %lo(_GLOBAL_OFFSET_TABLE_+(<EndLabel>-<StartLabel>))), <MO>
241 // add <MO>, %o7, <MO>
243 OutStreamer.EmitLabel(StartLabel);
244 MCOperand Callee = createPCXCallOP(EndLabel, OutContext);
245 EmitCall(OutStreamer, Callee, STI);
246 OutStreamer.EmitLabel(SethiLabel);
247 MCOperand hiImm = createPCXRelExprOp(SparcMCExpr::VK_Sparc_PC22,
248 GOTLabel, StartLabel, SethiLabel,
250 EmitSETHI(OutStreamer, hiImm, MCRegOP, STI);
251 OutStreamer.EmitLabel(EndLabel);
252 MCOperand loImm = createPCXRelExprOp(SparcMCExpr::VK_Sparc_PC10,
253 GOTLabel, StartLabel, EndLabel,
255 EmitOR(OutStreamer, MCRegOP, loImm, MCRegOP, STI);
256 EmitADD(OutStreamer, MCRegOP, RegO7, MCRegOP, STI);
259 void SparcAsmPrinter::EmitInstruction(const MachineInstr *MI)
262 switch (MI->getOpcode()) {
264 case TargetOpcode::DBG_VALUE:
265 // FIXME: Debug Value.
268 LowerGETPCXAndEmitMCInsts(MI, getSubtargetInfo());
271 MachineBasicBlock::const_instr_iterator I = MI;
272 MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
275 LowerSparcMachineInstrToMCInst(I, TmpInst, *this);
276 EmitToStreamer(OutStreamer, TmpInst);
277 } while ((++I != E) && I->isInsideBundle()); // Delay slot check.
280 void SparcAsmPrinter::EmitFunctionBodyStart() {
281 if (!MF->getSubtarget<SparcSubtarget>().is64Bit())
284 const MachineRegisterInfo &MRI = MF->getRegInfo();
285 const unsigned globalRegs[] = { SP::G2, SP::G3, SP::G6, SP::G7, 0 };
286 for (unsigned i = 0; globalRegs[i] != 0; ++i) {
287 unsigned reg = globalRegs[i];
288 if (MRI.use_empty(reg))
291 if (reg == SP::G6 || reg == SP::G7)
292 getTargetStreamer().emitSparcRegisterIgnore(reg);
294 getTargetStreamer().emitSparcRegisterScratch(reg);
298 void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
300 const DataLayout *DL = TM.getDataLayout();
301 const MachineOperand &MO = MI->getOperand (opNum);
302 SparcMCExpr::VariantKind TF = (SparcMCExpr::VariantKind) MO.getTargetFlags();
305 // Verify the target flags.
306 if (MO.isGlobal() || MO.isSymbol() || MO.isCPI()) {
307 if (MI->getOpcode() == SP::CALL)
308 assert(TF == SparcMCExpr::VK_Sparc_None &&
309 "Cannot handle target flags on call address");
310 else if (MI->getOpcode() == SP::SETHIi || MI->getOpcode() == SP::SETHIXi)
311 assert((TF == SparcMCExpr::VK_Sparc_HI
312 || TF == SparcMCExpr::VK_Sparc_H44
313 || TF == SparcMCExpr::VK_Sparc_HH
314 || TF == SparcMCExpr::VK_Sparc_TLS_GD_HI22
315 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_HI22
316 || TF == SparcMCExpr::VK_Sparc_TLS_LDO_HIX22
317 || TF == SparcMCExpr::VK_Sparc_TLS_IE_HI22
318 || TF == SparcMCExpr::VK_Sparc_TLS_LE_HIX22) &&
319 "Invalid target flags for address operand on sethi");
320 else if (MI->getOpcode() == SP::TLS_CALL)
321 assert((TF == SparcMCExpr::VK_Sparc_None
322 || TF == SparcMCExpr::VK_Sparc_TLS_GD_CALL
323 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_CALL) &&
324 "Cannot handle target flags on tls call address");
325 else if (MI->getOpcode() == SP::TLS_ADDrr)
326 assert((TF == SparcMCExpr::VK_Sparc_TLS_GD_ADD
327 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_ADD
328 || TF == SparcMCExpr::VK_Sparc_TLS_LDO_ADD
329 || TF == SparcMCExpr::VK_Sparc_TLS_IE_ADD) &&
330 "Cannot handle target flags on add for TLS");
331 else if (MI->getOpcode() == SP::TLS_LDrr)
332 assert(TF == SparcMCExpr::VK_Sparc_TLS_IE_LD &&
333 "Cannot handle target flags on ld for TLS");
334 else if (MI->getOpcode() == SP::TLS_LDXrr)
335 assert(TF == SparcMCExpr::VK_Sparc_TLS_IE_LDX &&
336 "Cannot handle target flags on ldx for TLS");
337 else if (MI->getOpcode() == SP::XORri || MI->getOpcode() == SP::XORXri)
338 assert((TF == SparcMCExpr::VK_Sparc_TLS_LDO_LOX10
339 || TF == SparcMCExpr::VK_Sparc_TLS_LE_LOX10) &&
340 "Cannot handle target flags on xor for TLS");
342 assert((TF == SparcMCExpr::VK_Sparc_LO
343 || TF == SparcMCExpr::VK_Sparc_M44
344 || TF == SparcMCExpr::VK_Sparc_L44
345 || TF == SparcMCExpr::VK_Sparc_HM
346 || TF == SparcMCExpr::VK_Sparc_TLS_GD_LO10
347 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_LO10
348 || TF == SparcMCExpr::VK_Sparc_TLS_IE_LO10 ) &&
349 "Invalid target flags for small address operand");
354 bool CloseParen = SparcMCExpr::printVariantKind(O, TF);
356 switch (MO.getType()) {
357 case MachineOperand::MO_Register:
358 O << "%" << StringRef(getRegisterName(MO.getReg())).lower();
361 case MachineOperand::MO_Immediate:
362 O << (int)MO.getImm();
364 case MachineOperand::MO_MachineBasicBlock:
365 O << *MO.getMBB()->getSymbol();
367 case MachineOperand::MO_GlobalAddress:
368 O << *getSymbol(MO.getGlobal());
370 case MachineOperand::MO_BlockAddress:
371 O << GetBlockAddressSymbol(MO.getBlockAddress())->getName();
373 case MachineOperand::MO_ExternalSymbol:
374 O << MO.getSymbolName();
376 case MachineOperand::MO_ConstantPoolIndex:
377 O << DL->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
381 llvm_unreachable("<unknown operand type>");
383 if (CloseParen) O << ")";
386 void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
387 raw_ostream &O, const char *Modifier) {
388 printOperand(MI, opNum, O);
390 // If this is an ADD operand, emit it like normal operands.
391 if (Modifier && !strcmp(Modifier, "arith")) {
393 printOperand(MI, opNum+1, O);
397 if (MI->getOperand(opNum+1).isReg() &&
398 MI->getOperand(opNum+1).getReg() == SP::G0)
399 return; // don't print "+%g0"
400 if (MI->getOperand(opNum+1).isImm() &&
401 MI->getOperand(opNum+1).getImm() == 0)
402 return; // don't print "+0"
405 printOperand(MI, opNum+1, O);
408 /// PrintAsmOperand - Print out an operand for an inline asm expression.
410 bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
412 const char *ExtraCode,
414 if (ExtraCode && ExtraCode[0]) {
415 if (ExtraCode[1] != 0) return true; // Unknown modifier.
417 switch (ExtraCode[0]) {
419 // See if this is a generic print operand
420 return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
426 printOperand(MI, OpNo, O);
431 bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
432 unsigned OpNo, unsigned AsmVariant,
433 const char *ExtraCode,
435 if (ExtraCode && ExtraCode[0])
436 return true; // Unknown modifier
439 printMemOperand(MI, OpNo, O);
445 void SparcAsmPrinter::EmitEndOfAsmFile(Module &M) {
446 const TargetLoweringObjectFileELF &TLOFELF =
447 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
448 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
450 // Generate stubs for global variables.
451 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
452 if (!Stubs.empty()) {
453 OutStreamer.SwitchSection(TLOFELF.getDataSection());
454 unsigned PtrSize = TM.getDataLayout()->getPointerSize(0);
455 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
456 OutStreamer.EmitLabel(Stubs[i].first);
457 OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(), PtrSize);
462 // Force static initialization.
463 extern "C" void LLVMInitializeSparcAsmPrinter() {
464 RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);
465 RegisterAsmPrinter<SparcAsmPrinter> Y(TheSparcV9Target);